That question wasn't about black ops, but non black op opportunities. Like how everyone one of my characters does the drink for money and dance for 3 hr ops but none will ever claim it as a black op. I don't think that's a problem, I certainly wouldn't think so. Geez, I hope it's not a problem!
Edit: After rereading the rules I think these non black op would be the same as a skill that all Immortals have maxed out, it's fine as long as none of them ever claim it for a requirement.